With federal inmate texting, messages are relayed as a result of the federal Corrlinks/TRULINCS gadget

https://prisontexting733.evergrovio.com/posts/corrlinks-text-app-guide-the-best-way-to-message-federal-inmates

With federal inmate texting, messages are relayed by using the federal Corrlinks/TRULINCS process, and replies can go back to the exterior user as favourite text messages.